Stop motion for terry weave looms



Aug. 4, 1959 E. WILSON STOP MOTION FOR TERRY WEAVE' LOOMS Filed Jan. 9, 1958 :s Sheets-Sheet 1' INVENTOR: EUGENE WmsoN BY M, Lush 5 ATTORNEYS Aug. 4, 1959 E.-WILSON STOP MOTION FOR TERRY WEAVE LOOMS 3 Sheets-Sheet 2 Filed Jan. 9, 1958 INVENTOR" EDGE-NE- WmsoN ATTORNEYS Aug. 4, 1959 E. WILSON STOP MOTION FOR TERRY WEAVE LOOMS 3 Sheets-Sheet 3 Filed Jan. 9, 1958 INVENTQI): EUGENE Wussom BY whmglwr United States Patent Ofiice 2,897,849 Patented Aug. 4, 1959 STOP MorroN non TERRY WEAVE Looms a a Eugene Wilson, Clilfside,-N.C-.

1 sprains twat, nijssseaso; 1 1 5 6 Claims: (Cl;- 1-39- 353) h s. sense r la s..sens allv taia gr m nts in W tep mo on r woyWQaYe wms. a q epa lrlv to. an .ilWFQYd ap ar us gr. re de n th op. m tion ino era ve and sla en n th t rry. War du insthe. me tha th s p moti isre dar d iQP:

In the usual terry weave loom the warp threadsare novel terry warp dropwire lifting means which includes an actuating .cam, separate and adjustable relative to the terry warp slackening actuating cam, to operate a drop wire lifting. plate positioned beneath the terry warp drop wires andwhichplate is guided for vertical movement in a level manner .to insurethatthe drop wires on each terry thread are raised. and lowered equaltamounts simultaneously.

Some of the objects of the invention having been stated, other objects will. appear as the description proceeds when. takenin .connection with the accompanying drawings, in which-.- V V Figure 1 isa side elevation of a. terry weave loom with parts shown broken away and in section for purposes ofc y; r a a Figure 2.is an enlarged isometric view ofa portion'of the terry drop wire. lifting plate and associated parts;

ed r ratwa fie sn bsamsto te m the. round W a and thet r y -lqops- I'Ih 9l .Fl..W P i maintained unde onstan uni rnt n ion wh le. t e ter ywa n Pe od ca ly l keae o tha th sla Warp ma be ca ried. orwardly-d ri .predeterm aed eah p. st k s otthe. ar to form t e e ry oops, ..Inorder. .1 pro ide a t r. qt onfm t te ry w rna wel s. e. ound W rn. sep rat banks. of drop. iresatep ov ded. t r he r ads o eac ..warpfanditis neces a y. .thatthe ank of t rywa p op .vvi sberend ii inopera ive. or. lif ed dur ng t e metha the te rvwarn s slak nedinorder to p e nt af se knock-off. of. the 1.0 mi. On th usual r y. ears. learn t e. terrvwa n d op wires are. lifted or raised by a bar or the like during each of-the terry forming be ts of theloqmsqtha they cannot..fa1l.and stop henloomwh nth errvrvan) isslackened. In he. ouventimalt rry we ve;l m..bo h of ..these. opera.- tions, the periodicslackeningof the terry warpand the ift gof'thebank of terry warpv drop..wir.es.,.are carried Out .byv rotation .of. a single Io. effect movement to linkage connected to. the, terrywarpslackening apparatus V Figure ,3 is a rear elevation of the loom shown in Figure. 1. .Withthe ground warp beam removed and parts in sectiom... V t a Figure. 4 .is. .a fragmentary sectional plan view taken substantially along the line 44 in Figure 3; H Figure Sis an enlargedvertical sectional view taken substantiallyalong the line 5-5 in Figure. 3; a Figure..6..is.an enlarged verticalsectional view taken substantially along. the. line 66 in Figure 3;

andto. the .drop .Wire, lifting. .bar. andthus'..jsimultaneously effect boththese .operations Byusing a. .single .camtmcontrol both of theseopera: tions,.it is impossibleuto .varythe. timethe terrywarp.

drop .wires. are. renderedlinoperatiye.relative..toihe.

time that the terry warp threads are slackened, and .this is a..disadvantage..in that .it..limits. the speed. at..which the. loom maybeoperated and may not be effective when tightly .twistedor hard .terry. warp threads aroused. 1 It hasalso ..beenfound that a. better. terryzfabric'. can. be produced with fewer false stops bylengthening the time that the drop wiresare rendered inoperative andashortem ing. thelength of time..that.the terry .iwatp. is. slackened. .With the. foregoing in mind, it..is. .the..primary object of this. invention.to..provide. separatecamameans for controlling. theslackening of :the terry. .warp and another. cam. means. for. raising .or.lifting .the. drop; wires" a. short. time before, during and. after the. slackening oftheterry. warp threads toinsure that a falsestop .willnotbe effected due .to a slackening oftherterry warp, rather than because of..a ..broken. thread,- and to also ,provide means for easily. adjusting the .timingrelationtbetween the time the terry warp. .is. slackened-and .the timei-tho terry warpdrop wires are rendered inoperative;

. It is. another object oflthislinvention to providea-novel terrywarp. .slackeningactuating cam which-is opera-tedmore quickly. thanlithe conventional typeto thereby. pro-- sst lldmqth gobjeetaf thisiimention ftoprovidea.

Figure 7 is an enlarged :viewof. the upper portion of Figure 5 showingthe terry warp drop wires in raised or inoperative position. a 7

Referring to the drawings, the loom includes the usual side frames 16) and 11 (Figures 3 and 4), a reciprocable lay l2, and .a conventional terry loom reed 13 hingedly mounted onthe lay. 12. .Thereed 13 is controlled in a Well known manner, not shown, so that the reed is in therearmost. positionshown fortwo beat-up strokes of thellay, and, thenis moved to. its forwardmost position on the third..beat-up stroke of the lay or the terry loop forming beat-up. stroke. .The operation of the reed l3 i s w.ell known and therefore will not be described in detail. ..Ihe .,1ay.12 isreciprocated. by rotation of a crank shaft 14 suitably connected by conventional gearing, not shown, to. a main drive shaftlS. mounted for rotation'in the side. frames 10. and 11. The main shaft 15 makes one revolution .for..each two revolutions of the crank shaft .liand .hasa gear 16 fixed thereon which engages the, teethof a. mating gear .17 .(Figures 3 and 4) fixed on one .end' of .a reed .motion shaft 18. The shaft 18 is rotatably mountedin bearing members 20 and 21 (Figure 4)...suitably.secured. to a rear beam 22. bysupport brackets 23. and.2.4. .;The rear beam 22 is fixed at opposite ends .on. thelloom side frames 10 and 11. The gear 17 is one and oneahalf times -as large as the gear 16.. on themain shaft and therefore, the reed motion shaft 18 makesonecomplete revolution with each one and. one=half ..revolutions of the main shaft while the crankshaft 14 makes three. revolutions.

.The rear of, the loomside frames 10 andll support a ground warp, beam 25.provided with any suitable typeguiderods. 26 and. 27t.are suitably supported in respective stop motion support brackets 31 and 32 fixed on the respective side frames 10.and lltFigure 3).

The stop motion unit 30iincludes opposite end brackets 40.. and 41. (Figures 1,5. and 7). Therods 40 and 4-1' H arebentdownwardlvat theinrear ends and fixed-on therespective stop motion support brackets 31 and 32. The end brackets 35 and 36 support opposite ends of electrical contact bars 43 which are of conventional construction and have two elements insulated from each other. The contact bars 43 are spaced apart from each other and are suitably connected to an electrical circuit, not shown, to operate the stop mechanism .of the loom in a conventional manner upon completion of an electrical contact between the two elements of one of the contact bars 43 in a manner to be presently described.

The end brackets 35 and 36 also support opposite ends of drop wire guide bars 45 spaced below and in staggered relation to the contact bars 43 and which serve to confine the drop wires and prevent radial twisting of the wires about the contact bars 43. The drop wires are indicated at 49 and divided into two banks indicated broadly at 50 and 51 for the terry and ground warp threads respectively. Each of the drop wires 49 are identical and are provided with upper slots 52 which are penetrated by the contact bars 43 and thread receiving openings 53 through which the warp threads are passed to normally support the drop wires 49 in substantially the position shown in Figure 7 during normal operation of the loom. Should one of the warp threads become broken, it would no longer support the corresponding drop wire 49 and the drop wire would then drop so that the inwardly projecting portions in the slot 52 would complete an electrical contact between the separate elements of the contact bar 43 and actuate the conventional stop motion mechanism of the loom.

The terry warp threads indicated at T are supplied from a terry warp beam 60 (Figure 1) rotatably supported at opposite ends on the upper rear ends of the frame members and 11. Any suitable let-off may be applied to the terry beam 60 to apply a light tension on the terry threads T and prevent free rotation of the terry beam 60. From the terry beam 60, the terry warp threads T extend downwardly beneath a first feed roll 61 and over a second feed roll 62 which is held against the roll 61 and rotatable therewith when one of the rolls is rotated. One end of the feed roll 62 has a ratchet wheel 63 fixed thereon which is engaged by a ratchet pawl 64 oscillatably mounted on one end of a racking lever 65 adapted to at times rack the wheel 63 and rolls 61, 62 in a manner to be later described.

From the feeding roll 62, the terry warp threads T extend downwardly in Figure 1, beneath a guide rod 66 suitably supported'at opposite ends on the side frames 16 and 11, through the stop motion apparatus 30, and to the fell of the fabric F. The terry warp threads T pass through the openings 53 in the forwardmost bank 50 of drop wires 49 to support the same during the time that the terry warp yarns T are held under tension. The parts of the loom heretofore described are conventional partsof the loom and it is in association with these parts that the present invention will be described.

The mechanism for actuating the racking lever 65 includes a control link 70 (Figure 1), the upper end of which is oscillatably connected to one end of the pawl 65 and the lower end of which is oscillatably connected the the outer end of a lever 71. The inner end of the lever 71 is fixed on one end of a rock shaft 72 (Figures 3 and 4) oscillatably mounted in the side frame member 10 and in a bearing member 73 carried by the rear beam 22. The inner end of the shaft 72 has one end of a lever 74 fixed thereon and the other end of which is provided with a roller riding in a cam raceway of a terry motion cam 75. The terry motion cam 75 is suitably secured on the reed motion shaft 18 and the cam raceway has a high portion 75a and a low portion 75b (Figure 1).

Each time the reed motion'shaft 18 makes a complete revolution, the control link 70, racking lever 65 and ratchet pawlj64 will move to rotate the rolls 61 and 62 and slacken, the terry warp fthreads T a. predetermined amount. Of course, the length of stroke of the control link 70 and racking pawl 65 may be varied to increase or decrease the amount of slack placed in the terry warp T as desired. The amount of slack in the terry warp T may be varied by adjusting the pivot point at the upper end of the link 70 or the pivot point at the lower end of the link 70 to thus increase or decrease the movement of the pawl 64 with a given stroke being imparted by the cam 75. j

As heretofore stated, it is important that the bank of drop wires 50 be prevented from dropping when the terry warp threads T are slackened and to this end, a plate 80 is positioned beneath the bank of drop wires 50 and has a plurality of ribs and grooves indicated at 81 thereon to help prevent turning of the drop wires when they are engaged by the plate 80 in a manner to be presently described. Opposite ends of the plate 80 are mounted for vertical adjustment on the threaded upper ends of respective guide shafts 85 and 86 which are guided for vertical sliding movement in bearing support members 90 and 91. The bearing support-members 90 and 91 are suitably secured to the support brackets 31 and 32 respectively carried by the side frame members 10 and 11. l

The lower ends of the shafts 85 and 86 have outwardly extending feet92 and 93 suitably secured thereto and which are at times engaged by respective rollers 94 and 95 fixed on the rear ends of respective lever arms 96 and 97. The other ends of the lever arms 96 and 97 are fixed adjacent opposite ends of a transverse control shaft 100, opposite ends of which are suitably secured in downwardly extending flange portions 102 and 103 of the respective bearing members and 91 (Figure 3). The medial portion of the shaft is rotatably supported in a bearing member 105 (Figures 1 and 3) fixed on the upper end of a support arm 106, the lower end of which is fixed on the support 24 for the bearing member 21 (Figure 4).

The shaft 100 is at times oscillated by a lever arm 107 fixed at its inner end on the shaft 100 and having the upper end of a control link 110 oscillatably attached to its outer end. The lower end of the link 110 is oscil-. latably mounted as at 111 (Figure 5) intermediate the ends of a control lever 112. One end of the control lever 112 is oscillatably mounted on a relatively short shaft 114 opposite ends of which are fixed in rearwardly extending portions of the support brackets 23 and 24. The opposite end of the lever 112 carries a roller 116 riding in the cam raceway of a drop wire actuating cam 120 having a high cam portion 120a and a low cam portion 12%.

With rotation of the main drive shaft 15, rotation will be imparted to the reed motion shaft 18 through the meshing gears 16 and 17 so that the reed motion shaft 18 will make one complete revolution with each three revolutions of the crank shaft 14. It is apparent, by referring to Figures 5 and 6, that the first pick or beat-up stroke of the lay 12 will be made with the terry slackening apparatus and roller carried by the lever arm 74 in the low portion 75b as shown in Figure 6 and by the time that the roller on the lever 74 reaches the high portion 75a of the cam 75, the roller 116 on the lever 112 will have moved onto the high portion 120a of the cam 120 so that the plate 80 will be in the raised position shown in Figure 7. Thus, the bank 50 of drop wires 49 will be supported by the plate 80 when the terry warp threads T are slackened by movement of the roller on the cam lever 74 moving onto the high portion 750: of the cam 75.

It is also apparent by referring to Figures 5 and 6 thatv the lever 74 will be lowered and raised by the high portion 75a of the cam 75 during the time that the roller 116 on the lever 112 engages the high portion 120a of the cam 120. t It should also be apparent that since' control -of the terry slackening mechanism and control of the drop wire support plate 80 are entirely nisms operate may be varied by merely rotating the earns 75 and 120 relative to each other to desired timing.

With the earns 75 and 120 positioned inrelation to each other as shown in Figures 5 and 6, it is apparent that with rotation of the shaft 18, the plate 80 will first be raised to render the drop Wires in the bank 50 inoperative before the terry motion lever 71 is raised to rack the rollers 61 and 62 and slacken the terry threads T. The shape of the cam 120 will cause the plate 80 to remain in raised position, rendering the drop wires 49 in the bank 50 inoperative, for a short time following the completion of the terry warp slackening operation.

With the actuating linkage operatively connecting the plate 80 with the cam 120, it is apparent that any movement imparted to the lever 112 by movement of the roller 116 will be simultaneously imparted to both of the levers 96 and 97 and thus raise both vertical shafts 85 and 86 simultaneously so that the plate 80 will be raised in a level manner throughout its length. Thus, all of the drop wires 49 of the bank 50 will be raised equal amounts and at the same time. It is also an advantage to have the plate 80 moving upwardly in alinement with the longitudinal position of the drop wires 49 rather than have the plate raised in an are as has heretofore been done because a vertically moving plate 80 will raise the drop wires 49 in a straight line so that they do not engage the guide bars 45 and there will be no rubbing or wear between the lower ends of the drop wires 49 and the plate 80 as it is raised.

It is thus seen that a stop motion for terry weave looms has been provided wherein the control means for slackening the terry warp during the terry beat-up strokes of the lay and the control means for rendering the bank of terry warp drop wires inoperative during the slackening of the terry warp are completely separate from each other and controlled by separate cam means fixed on a common shaft. The operating cams for each operation are adjustable relative to each other to provide means for varying the time of operation of the terry warp slackening means and the time of operation of the drop wire plate to render the drop wires inoperative.

In the drawings and specification there has been set forth a preferred embodiment of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a pile loom for weaving terry cloth or the like having a terry warp, a bank of drop wires at times supported by the terry warp, means to stop the loom when any drop wire of said bank is not supported, and a shaft driven in timed relation to operation of the loom, the combination therewith of terry warp slakening means for intermittently slackening said terry warp, first cam means carried by said shaft and operatively connected to said terrp warp slackening means to at times actuate the same, a drop wire supporting plate positioned below said bank of drop wires, and second cam means carried by said shaft and operatively connected to said plate to move the same into engagement with said drop Wires for supporting said drop wires, said drop wire supporting plate being movable in a straight vertical path beneath said bank of drop wires.

2. In a loom for Weaving terry cloth or the like having a terry warp, a bank of drop wires at times supported by the terry warp, terry warp slackening means to intermittently slacken said terry Warp, first cam means operatively connected to said terry warp slackening means, and drop wire supporting means positioned beneath said obtain the bank of drop wires and intermittently movable into and out of engagement with said drop wires to support said dropwires, said drop Wire supporting means comprising a'vertically movable drop wire supporting plate posij tioned beneath said bank ofdrop wires, guide meanslat each end of said plate for guiding said plate in straight I vertical movement, and second cam means operatively connected to said guide means to raise and lower sa'id' platein timed relation to operation of said loom and m tively connected to said terry warp slackening means,

and drop wire supporting means positioned beneath said bank of drop wires and intermittently movable into and out of engagement with said drop wires to support said drop wires, said drop Wire supporting means comprising a vertically movable drop wire supporting plate positioned beneath said bank of drop wires, a guide shaft supporting each end of said plate, guide means carried by said loom for guiding said guide shafts and plate in straight vertical movement, a control shaft rotatably carried by said loom, a lever arm fixed adjacent each end of said control shaft and engaging said guide shafts, and second cam means operatively connected to said control shaft to intermittently oscillate said shaft to thereby raise and lower said plate in timed relation to opera tion of said loom and independently of operation of said first cam means.

4. In a loom for weaving terry cloth or the like having a reed motion shaft driven in timed relation to said loom, a terry warp, a bank of drop wires at times supported by the terry warp, terry warp slackening means to intermitently slacken said terry warp, first cam means mounted on said reed motion shaft and operatively connected to said terry warp slackening means, and drop wire supporting means positioned beneath said bank of drop wires and intermittently movable into and out of engagement with said drop wires to support said drop wires, said drop wire supporting means comprising a vertically movable drop wire supporting plate positioned beneath said bank of drop wires, guide means at each end of said plate for guiding said plate in straight vertical movement, and second cam means mounted on said reed motion shaft and operatively connected to said guide means to raise and lower said plate in timed relation to operation of said loom and independently of operation of said first cam means.

5. In a loom for weaving terry cloth or the like having a reed motion shaft driven in timed relation to said loom, a terry warp, a bank of drop wires at times supported by the terry warp, terry warp slackening means to intermittently slacken said terry warp, first cam means mounted on said reed motion shaft and operatively connected to said terry warp slackening means, and drop wire supporting means positioned beneath said bank of drop wires and intermittently movable into and out of engagement with said drop wires to support said drop wires, said drop wire supporting means comprising a vertically movable drop wire supporting plate positioned beneath said bank of drop wires, a guide shaft supporting each end of said plate, guide means carried by said loom for guiding said guide shaft and plate in straight vertical movement, a control shaft rotatably carried by said loom, a lever arm fixed adjacent each end of said control shaft and engaging corresponding guide shafts, and second cam means mounted on said reed motion shaft and operatively connected to said control shaft to intermittently oscillate said shaft to thereby raise and lower said plate in timed relation to operation of said loom and independently of operation of said first cam means.

6. In a loom for weaving terry cloth or the like having a reed motion shaft driven in timed relation to said loom,

a terry warp, a bank of drop wires at times supported by the terry warp, terry warp slackening means to intermittently slacken said terry warp, first cam means mounted on said reed motion shaft and operatively connected to said terry warp slackening means, and drop wire supporting means positioned beneath said bank of drop wires and intermittently movable into and out of engagement with said drop wires to support said drop wires, said drop wire supporting means comprising a vertically movable drop wire supporting plate positioned beneath said bank of drop wires, a guide shaft supporting each end of said plate, guide means carried by said loom for guiding said guide shaft and plate in straight vertical movement, a control shaft rotatably carried by said loom, a lever arm fixed adjacent each end of said control shaft and engaging corresponding guide shafts, a control arm fixed at one end intermediate the ends of said control shaft, and second cam means mounted on said reed motion shaft and operatively connected to the other end of said control arm to intermittently oscillate said shaft to thereby raise and lower said plate in timed relation to operation of said loom and independently of operation of said first cam means.

References Cited in the file of this patent UNITED STATES PATENTS 2,065,731 Payne Dec. 29, 1936 FOREIGN PATENTS 126,790 Switzerland Sept. 1, 1928 

